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See detailOrganizational learning and complex problem solving. Towards a better understanding of the modern workplace.
Jaster, Christian UL; Mainert, Jakob; Greiff, Samuel UL

Scientific Conference (2017, September)

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See detailMining AndroZoo: A Retrospect
Li, Li UL

in The International Conference on Software Maintenance and Evolution (ICSME) (2017, September)

This paper presents a retrospect of an Android app collection named AndroZoo and some research works conducted on top of the collection. AndroZoo is a growing collection of Android apps from various ... [more ▼]

This paper presents a retrospect of an Android app collection named AndroZoo and some research works conducted on top of the collection. AndroZoo is a growing collection of Android apps from various markets including the official Google Play. At the moment, over five million Android apps have been collected. Based on AndroZoo, we have explored several directions that mine Android apps for resolving various challenges. In this work, we summarize those resolved mining challenges in three research dimensions, including code analysis, app evolution analysis, malware analysis, and present in each dimension several case studies that experimentally demonstrate the usefulness of AndroZoo. [less ▲]

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See detailBrexit and the Single European Financial Market
Howarth, David UL; Quaglia, Lucia

in Journal of Common Market Studies (2017), 55(S1), 149164

Brexit raises a set of important questions with reference to the Single Market, especially in financial services. What are the implications of Brexit for the UK and its financial industry; and what are ... [more ▼]

Brexit raises a set of important questions with reference to the Single Market, especially in financial services. What are the implications of Brexit for the UK and its financial industry; and what are the implications of Brexit for the EU and the single financial market? This topic is examined in four consecutive steps. We first discuss the UK’s influence in the development of the single financial market, including EU financial regulation, over the past two decades – and thus both prior to, and after, the international financial crisis. This overview is necessary in order to grasp the potential implications of Brexit for the UK, the EU and their financial industries – examined in the second step. We then examine the so-called safeguards secured by the UK government from the EU in the run up to the Brexit referendum and the position of the UK’s financial industry during the Brexit campaign and after the referendum. Finally, we review the post-Brexit options available to manage the relationship between the UK and the EU, specifically with regard to finance. It is argued that that the UK has been a key player in the development of the single financial market, especially prior to the international financial crisis, and has greatly benefited from it. The – at times considerable – British influence made EU financial regulation more market-friendly and open to third countries than it would have been otherwise. The EU–UK agreement signed prior to the Brexit referendum contained several clauses concerning economic governance, including non-discrimination provisions for the financial industry based in the UK. However, these provisions mainly reflected the status quo and re-stated existing commitments. The City of London and British financial industry were mostly in the pro-Remain camp during the referendum campaign – albeit there were some noteworthy financial sector supporters of Brexit. Following the June referendum, the City unsuccessfully mobilized in order to retain full access to the single financial market – the alternative options were considerably less appealing for the UK financial industry. [less ▲]

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See detailSelektives Enkodieren in figuralen Matrizen.
Domnick, Florian UL; Becker, Nicolas; Greiff, Samuel UL et al

Scientific Conference (2017, September)

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See detailSex and gender in family business succession research: A review and forward agenda from a social construction perspective
Nelson, Teresa; Constantinidis, Christina UL

in Family Business Review (2017), 30(3), 219-241

This article focuses on how family business succession research has engaged and may be further enriched by application of a gender lens as socially constructed. We analyze the succession literature ... [more ▼]

This article focuses on how family business succession research has engaged and may be further enriched by application of a gender lens as socially constructed. We analyze the succession literature developing a gender terms vocabulary and five themes of historical engagement. Finding a lack of theoretical grounding, we apply the construct of gender, through expectation states theory, revising the Sharma and Irving model of successor commitment to examine how a socially constructed view of gender shifts and opens up points of view. We then present a forward looking agenda to motivate future scholarship. [less ▲]

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See detailFacts and Statements of the 12th FIEP European Congress
Bund, Andreas UL

Presentation (2017, September)

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See detailDynamics of Income Rank Volatility: Evidence from Germany and the US
Chauvel, Louis UL; Hartung, Anne UL; Palmisano, Flaviana

E-print/Working paper (2017)

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions ... [more ▼]

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions, this paper proposes a framework that is based on individuals’ relative positions in the distribution, and is neutral in relation to structural changes that occur in the economy. Applying this approach to investigate rank volatility in Germany and the US over three decades, we show that while poorer individuals within both countries are the most volatile, the volatility trend for the middle class in each of these countries differs. [less ▲]

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See detailLaboratory experiment for damage assessment using the DAD-method
Erdenebat, Dolgion UL; Waldmann, Danièle UL; Teferle, Felix Norman UL

in Conference proceedings SMAR 2017 (2017, September)

In the following, a new analytical method, the Deformation Area Difference (DAD) method for damage assessment of bridge structures is applied using experimental test results of a statically loaded beam ... [more ▼]

In the following, a new analytical method, the Deformation Area Difference (DAD) method for damage assessment of bridge structures is applied using experimental test results of a statically loaded beam. An essential prerequisite for the application of this method is a high precise measurement of the deflection line. In this paper, the results from a laboratory experiment using modern measurement techniques such as photogrammetry and displacement sensors are discussed. A reinforced concrete beam is stepwise loaded until reaching the ultimate limit state. The DAD-method is applied to the resulting data from the measurements and the outcome is discussed for further optimisation of the method. In principle, the measured deflection line of the beam contains already essential information on discontinuities which occur due to cracking. These entries are processed and visualised using the DAD-method. This study shows that a high accuracy of the measurement techniques in combination with the DAD-method can become an effective tool for damage detection. [less ▲]

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See detailZusammenhänge zwischen Zahlenstrahlschätzfähigkeit, Mathematikleistung und Schülercharakteristika: Eine Vollerhebung mit 6484 Luxemburgischen Neuntklässlern
Nurayadin, Sevim; Ugen, Sonja UL; Martin, Romain et al

Scientific Conference (2017, September)

In der Zahlenstrahlschätzaufgabe sehen die Probanden eine Zahl und einen leeren Zahlenstrahl, bei dem nur die erste und die letzte Position markiert und mit ihrem Wert beschriftet sind. Die Aufgabe der ... [more ▼]

In der Zahlenstrahlschätzaufgabe sehen die Probanden eine Zahl und einen leeren Zahlenstrahl, bei dem nur die erste und die letzte Position markiert und mit ihrem Wert beschriftet sind. Die Aufgabe der Probanden besteht darin, die Position der Zahl auf dem Strahl anzugeben. Der vorherrschende Ansatz in der Literatur geht davon aus, dass diese Aufgabe die Qualität der mentalen Repräsentation numerischer Größen erfasst. Diese gibt Lernen ein Verständnis von numerischen Größen und ihren Interrelationen, das eine wichtige Grundlage für den Erwerb anspruchsvollerer mathematischer Kompetenzen z.B. in Arithmetik oder Algebra darstellt. Zahlreiche Studien fanden positive Korrelationen zwischen der Zahlenstrahlschätzfähigkeit und der Mathematikleistung. Daher bietet es sich an, die Zahlenstrahlschätzaufgabe zur Diagnostik mathematischer Leistung und Entwicklung zu nutzen. Jedoch ist zum einen noch unklar, wie die Zahlstrahlschätzfähigkeit in der Population ausgeprägt und verteilt ist. Zum anderen ist offen, inwieweit die Korrelation mit der Mathematikleistung eine Scheinkorrelation darstellt, die auf den Einfluss anderer Personeneigenschaften zurückgeht. Um diese Punkte zu klären, analysierten wir Daten aus einer Vollerhebung aller Neuntklässler in Luxemburg (N = 6484). Die Schüler lösten die Zahlenstrahlschätzaufgabe mit ganzen Zahlen sowie Brüchen, absolvierten einen standardisierten Mathematikleistungstest und beantworteten zahlreiche Fragen zu domänenspezifischen (Matheängstlichkeit, Selbstkonzept, Interesse, Testmotivation) und domänenübergreifenden (Geschlecht, Immigrationsstatus, Gewissenhaftigkeit und elterlicher sozioökonomischer Status) Personenmerkmalen. Wir dokumentierten Mittelwerte und Verteilungseigenschaften der Zahlenstrahlschätzfähigkeit für diverse Subpopulationen (Jungen, Mädchen, Migranten, Schulformen etc.). Die Ergebnisse von Mehrebenenregressionsmodellen zeigten, dass die Zahlenstrahlschätzfähigkeit erheblich enger als alle anderen erhobenen Personeneigenschaften mit der Mathematikleistung zusammenhing. Der Zusammenhang war stärker für das Schätzen von Brüchen als ganzen Zahlen. Die Ergebnisse bestätigen die Annahme, dass die Zahlenstrahlschätzfähigkeit eine zentrale Komponente mathematischen Vorwissens erfasst, die weiteres Lernen leitet. In Anbetracht der einfachen Handhabung kann die Aufgabe vielfältig eingesetzt werden, um die mathematische Leistung in der Schule zu messen oder vorherzusagen. Zukünftige Studien sollten verstärkt die Nutzung der Aufgabe in Interventionen erproben. [less ▲]

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See detailA Deep Learning Approach for Optimizing Content Delivering in Cache-Enabled HetNet
Lei, Lei UL; You, Lei; Dai, Gaoyang et al

in IEEE International Symposium on Wireless Communication Systems (ISWCS), Bologna, Aug. 2017 (2017, August 31)

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See detailIntervention strategies to improve the quality of teachers´ judgments: Changes in the accuracy of teachers´ transition decisions
Pit-Ten Cate, Ineke UL; Krolak-Schwerdt, Sabine UL; Hörstermann, Thomas UL et al

Scientific Conference (2017, August 30)

This paper focuses on intervention modules to improve teachers’ diagnostic competence, especially in regards to decisions on students’ transition from primary to secondary education. Although these ... [more ▼]

This paper focuses on intervention modules to improve teachers’ diagnostic competence, especially in regards to decisions on students’ transition from primary to secondary education. Although these transition decisions should be based on academic achievement, research has shown non-academic variables to influence decisions, leading to disadvantages for specific groups of students. Using an experimental pre-post design, we investigated the short and long term effects of accountability, theoretical knowledge and the application of prediction rules on teachers’ judgment accuracy, respectively. Pre-intervention data showed that although teachers’ decision accuracy was of high standard, decision accuracy for ethnic majority students was significantly higher than for ethnic minority students. Increased accountability resulted in increased decision accuracy, especially in regards to decisions for ethnic minority students. Similarly, the introduction of theoretical models of decision making and judgment formation and the application of prediction rules also resulted in an improvement of transition decisions but only for ethnic minority students. Unfortunately, the differential intervention effects of the intervention modules could not be maintained over time, that is, at follow up, the ethnicity bias reappeared. From these studies we can conclude that all three intervention modules can improve the accuracy of teachers’ transition decisions. In line with the intention of the interventions, the disproportionally high rate of decision errors for ethnic minority students observed pre-intervention was eliminated post-intervention and in line with error rates for ethnic majority students. However, training or instruction should be repeated briefly before making such judgments as their influence was not maintained over time. [less ▲]

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See detailStereotypes and attitudes towards students with special educational needs in relation to teachers´ attitudes towards inclusive education
Pit-Ten Cate, Ineke UL; Krischler, Mireille UL; Krolak-Schwerdt, Sabine UL

Scientific Conference (2017, August 30)

Decisions concerning the educational instruction and pathways of students with special educational needs (SEN) may be affected by general stereotypes and associated teachers´ attitudes. Both stereotypes ... [more ▼]

Decisions concerning the educational instruction and pathways of students with special educational needs (SEN) may be affected by general stereotypes and associated teachers´ attitudes. Both stereotypes and attitudes affect judgments and behavior and hence may be pivotal for the success of inclusive education. More specifically, stereotypes and attitudes can elicit positive or negative expectations and judgments, which in turn can enhance or limit the successful inclusion of students with SEN in regular classrooms. The current study investigated stereotypes of and teachers´ implicit attitudes toward students with SEN in relation to teachers´ explicit attitudes towards inclusive education. Results show that teachers hold ambivalent views of students with learning difficulties (i.e. low competence, high warmth), whereas students with behavioral problems are perceived as neither particularly (in)competent nor warm. These stereotypes matched teachers´ implicit attitudes to the extent that implicit attitudes towards students with learning difficulties were more negative than towards students with behavioral problems. Although teachers expressed positive attitudes towards the benefits of inclusion they reported negative attitudes in regards to their ability to teach students with SEN. No associations were found between stereotypes and implicit attitudes. Implicit attitudes towards students with SEN were also not associated with explicit attitudes towards inclusive education. The warmth dimension of stereotype was however positively correlated with perceived ability to teach students with SEN. That is, perceived ability to successfully teach these students may rely on perceptions of these students´ alleged sociability. [less ▲]

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See detailApproaching the relational nature of the port-city interface in Europe: ties and tensions between seaports and the urban
Hesse, Markus UL

in Tijdschrift voor Economische en Sociale Geografie = Journal of Economic & Social Geography (2017)

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See detailComparative Genomic Analysis of the Human Gut Microbiome Reveals a Broad Distribution of Metabolic Pathways for the Degradation of Host-Synthetized Mucin Glycans and Utilization of Mucin-Derived Monosaccharides
Ravcheev, Dmitry UL; Thiele, Ines UL

in Frontiers in Genetics (2017), 8

The colonic mucus layer is a dynamic and complex structure formed by secreted and transmembrane mucins, which are high-molecular-weight and heavily glycosylated proteins. Colonic mucus consists of a loose ... [more ▼]

The colonic mucus layer is a dynamic and complex structure formed by secreted and transmembrane mucins, which are high-molecular-weight and heavily glycosylated proteins. Colonic mucus consists of a loose outer layer and a dense epithelium-attached layer. The outer layer is inhabited by various representatives of the human gut microbiota (HGM). Glycans of the colonic mucus can be used by the HGM as a source of carbon and energy when dietary fibers are not sufficiently available. Both commensals and pathogens can utilize mucin glycans. Commensals are mostly involved in the cleavage of glycans, while pathogens mostly utilize monosaccharides released by commensals. This HGM-derived degradation of the mucus layer increases pathogen susceptibility and causes many other health disorders. Here, we analyzed 397 individual HGM genomes to identify pathways for the cleavage of host-synthetized mucin glycans to monosaccharides as well as for the catabolism of the derived monosaccharides. Our key results are as follows: (i) Genes for the cleavage of mucin glycans were found in 86% of the analyzed genomes, which significantly higher than a previous estimation. (ii) Genes for the catabolism of derived monosaccharides were found in 89% of the analyzed genomes. (iii) Comparative genomic analysis identified four alternative forms of the monosaccharide-catabolizing enzymes and four alternative forms of monosaccharide transporters. (iv) Eighty-five percent of the analyzed genomes may be involved in potential feeding pathways for the monosaccharides derived from cleaved mucin glycans. (v) The analyzed genomes demonstrated different abilities to degrade known mucin glycans. Generally, the ability to degrade at least one type of mucin glycan was predicted for 81% of the analyzed genomes. (vi) Eighty-two percent of the analyzed genomes can form mutualistic pairs that are able to degrade mucin glycans and are not degradable by any of the paired organisms alone. Taken together, these findings provide further insight into the inter-microbial communications of the HGM as well as into host-HGM interactions. [less ▲]

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See detailEuropean Unemployment Insurance – a good initiative missing proper foundation
Tkalec, Igor UL

Article for general public (2017)

The European Unemployment Insurance is a reawakened EU initiative imagined to function as a supranational coordination and stabilization mechanism. While its purpose is justified and its design viable, a ... [more ▼]

The European Unemployment Insurance is a reawakened EU initiative imagined to function as a supranational coordination and stabilization mechanism. While its purpose is justified and its design viable, a pre-condition that underpins such a scheme is currently absent. [less ▲]

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See detailDemocratic legitimacy [glossary]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

A political institution is legitimate when it succeeds in persuading people of the normative necessity of its existence. In a democratic system, this can be based both on various forms of popular consent ... [more ▼]

A political institution is legitimate when it succeeds in persuading people of the normative necessity of its existence. In a democratic system, this can be based both on various forms of popular consent (democratic legitimacy) and on other kinds of foundations (generic legitimacy). With reference to the European Union, debates have focused on empirical support for the EU, the nature of its "democratic deficit", and the potential conflict between European integration and national democratic sovereignty. [less ▲]

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